Edexcel GCSE Combined Science Higher Tier Tutors

Leading Tuition’s Higher-tier Pearson Edexcel GCSE Combined Science tutoring is one-to-one teaching for the 1SC0 papers 1BH, 1CH, 1PH, 2BH, 2CH and 2PH, each 60 marks and 1 hour and 10 minutes. Higher entries can be awarded grades from 4-4 to 9-9, and 4-3 for a mark a small number below the 4-4 boundary, so our lessons concentrate on the content that only the Higher papers examine.

Combined Science is a double award, so a Higher student receives a double grade. Everything below comes from Pearson’s specification, June 2025 examiners’ reports and grade-boundary documents, and each section says what it changes in our teaching.

How our Higher Combined Science programme is organised, paper by paper

The specification’s assessment page lists the Higher papers and the topics each one covers. We plan teaching against these papers, not against a general Biology, Chemistry and Physics course, because the marks are awarded paper by paper and then added into a single subject mark.

Each paper is “Written examination: 1 hour and 10 minutes”, 60 marks and 16.67% of the qualification, according to the specification, and “Students must complete all assessment in May/June in any single year.” The same document says “Students must complete all assessments in the same tier”, which means a Higher entry sits every paper at Higher. A student cannot take the Biology papers at Higher and the Physics papers at Foundation, so the tier question is settled once for the whole course and our planning covers Biology, Chemistry and Physics together.

The specification also states that “16 marks of the paper will be overlap questions that appear in both the foundation and higher tier papers.” On a 60-mark paper that leaves 44 marks (60 − 16) outside the 16 overlap marks. We therefore begin each paper’s block with the shared base, because every Higher paper stands on it, and then spend the larger share of lesson time on the Higher-only content set out in the third section of this page. For the double-award grading, the core practicals and the full set of papers, our Edexcel GCSE Combined Science tutoring overview covers the qualification as a whole; this page deals with the Higher tier only.

The Higher grade range, and what Pearson says about choosing the tier

Pearson’s specification describes the grading in its own words: “This GCSE qualification will be graded and certificated on a 17-grade scale from 9–9 to 1–1 using the total subject mark where 9–9 is the highest grade. Individual papers are not graded.” For the Higher tier it continues: “for higher tier, grades 4–4 to 9–9 are available, however if the mark achieved is a small number of marks below the 4–4 grade boundary, then a grade 4–3 may be awarded.” Below that, the specification says a student whose achievement falls under the minimum the board judges sufficient receives an unclassified U result. It also says “The higher tier paper will target grades 4–9.”

Pearson also published guidance for schools on entering students for a tier. It was written for the 2019 exams, and we use it as the board’s own account of what the Higher papers are built to do, not as a statement of current entry dates. In that 2019 guidance Pearson says:

• Predicted grade. “Those students predicted to attain grades 6 or above for GCSE Science should be aiming towards Higher Tier.”
• Progression. Some post-16 providers require grade 6 at GCSE in all three disciplines, and “If grade 6 is a requirement, then this can only be achieved in the higher-tier papers.”
• Demand. “Around half of items at Higher Tier will be targeted at medium demand processes and around half are targeted at high demand processes.”
• Running order. “Higher Tier papers will generally start with medium demand questions, and move on to higher-demand questions in the second half of the paper.” Students at the lower end of Higher “may find that there are fewer questions overall that they can access”, in Pearson’s words.
• Extended answers. The extended open response question in the Higher tier “is targeted from grades 4 to 9, to stretch the most able students.”
• Overlap. The 2019 guidance gives the shared share of marks as twenty-seven per cent, which sits beside the specification’s figure of 16 of the 60 marks on each paper.
• Physics equations. “Within our Higher Tier papers, candidates will be expected to recall equations, with limited scaffolding, for more complex equations.”

The specification adds a requirement on the mathematics: “The minimum level of mathematics in the higher tier examination papers will be equivalent to foundation tier GCSE in Mathematics.” In our programme this becomes a short check in the first lessons. A tutor sets a few mathematics questions at that level inside Biology, Chemistry and Physics contexts, alongside the student’s latest school mock, before planning the term. Where the check shows the mathematics holding a student back more than the science does, the early lessons work on rearranging equations and standard form first, because both recur across the Higher-only content below.

Families still weighing both tiers can read our Foundation-tier Edexcel GCSE Combined Science tutoring page, which sets that tier out on its own terms. We do not compare the tiers’ boundaries, because they are separate papers with separate boundary tables.

What only the Higher papers examine: Biology, Chemistry and Physics

The specification says how it marks this content: “text in bold indicates content that is for higher tier only”. We read the bold from the font data inside the specification PDF, not from extracted text, because the topic headings and the “Students should”, “Use of mathematics” and “Suggested practicals” labels are bold as well and are not content. Only statements whose own words are in bold are listed; where a statement is partly bold, only the bold words are Higher-only. Each row names the paper the specification places the topic in.

Biology

Statement 7.13 (plain type, so not Higher-only) covers insulin controlling blood glucose concentration, and the bold 7.14 adds glucagon. In Topic 1, items a to d are plain type and only item e is bold. The other rows are bold in full. We teach the hormone statements, 7.3 and 7.5 included, as feedback sequences written out from memory and then checked against the specification wording.

Chemistry

Plain-type statement 1.48 asks for masses of reactants and products from balanced equations; the bold 1.50 to 1.53 add the mole, calculations between mass, moles and particles, the reactant not in excess, and stoichiometry. In Topic 3 the plain-type statements cover hydrogen ions, pH 7 and indicators, and the bold ones add the pH–concentration relationship, weak and strong acids and redox in electrolysis. We teach calculations in a fixed layout and drill ionic and half equations separately, because these skills fail for different reasons.

Physics

Rows 2.23, 2.31 and 4.10 are partly bold. In 2.23 the plain words cover Newton’s third law applied to equilibrium situations, and the bold words add collision interactions and the link to the conservation of momentum. In 2.31 the plain words cover the dangers of large decelerations, and the bold words add estimating the forces on a public road. In 4.10 the plain words cover the change of direction at a boundary, and the bold words add speed. Everything else in the table is bold throughout. Our Physics lessons take the momentum rows in sequence, from 2.24 to 2.26 and then 2.23, so that a student meets the collision application of Newton’s third law after the equations it depends on.

Higher-only equations and mathematics

Appendix 4 of the specification prints the following equations in bold, and the board says “Equations required for higher tier only are shown in bold text.” They are momentum (momentum = mass × velocity, statement 2.24, in the list of equations students “should be able to recall and apply”), force = change in momentum ÷ time (statement 2.26), and the force on a conductor at right angles to a magnetic field carrying a current, equal to magnetic flux density × current × length (statement 12.13). The force and conductor equations are in the list the board describes as equations that “will be given in a formulae sheet at the end of the exam papers”, to be selected and applied. The June 2025 examiners’ report on 1PH adds that “a full list of all relevant Physics equations was also provided in a separate booklet as an appendix to the examination paper.” We teach each of these equations with its units and its rearrangements, and we practise choosing the right equation from a list, which is the skill the formulae sheet tests.

The “Use of mathematics” lists also carry bold bullets, and each one is Higher-only in the specification’s notation:

• Biology Topic 1 and Topic 8: “Calculate with numbers written in standard form (1b).”
• Biology Topic 6: “Understand and use inverse proportion – the inverse square law and light intensity in the context of factors affecting photosynthesis.”
• Chemistry Topic 1: “Calculations with numbers written in standard form when using the Avogadro constant (1b)” and “Convert units where appropriate particularly from mass to moles (1c).”
• Physics Topic 2: “Interpret enclosed areas in velocity-time graphs (4a, 4b, 4c, 4d, 4f).”
• Physics Topic 6: “Calculate the net decline, expressed as a ratio, in a radioactive emission after a given number of half-lives (1c, 3d).”
• Physics Topic 9: “Use vector diagrams to illustrate resolution of forces, a net force, and equilibrium situations (scale drawings only) (4a, 5a, 5b).”

One further mark in the font data is smaller than a bullet. In the Chemistry Topic 7 list, the bullet on gradients of graphs reads “(4d and 4e)”, and only the reference 4e is printed in bold. Appendix 1 defines 4e as “Draw and use the slope of a tangent to a curve as a measure of rate of change”. We note it as what the font data shows and do not build a claim on a single bold reference. Standard form is the bold mathematics that recurs most across the the sciences, so our early lessons give it its own short drills, and the Avogadro constant is then taught as an application of it, using the 1.445 × 10²³ answer that the June 2025 1CH report discusses below.

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Where the June 2025 Higher examiners’ reports show marks going

Pearson publishes an examiners’ report for each Higher paper. We read the June 2025 reports for the Higher papers and attribute each point below to the named paper. They are the board’s account of what candidates did, so we use them to decide where lesson time goes, not to predict a future paper.

1SC0 2BH (Biology 2): glucagon and the six-mark answer

The 2BH report says there “was some confusion over the role of glycogen, glucose, glucagon and insulin which resulted in the question scoring a range of levels by different ability candidates.” In Question 6(b) a Level 3 response was “worth 5 marks” and the examiners recorded that it did “not refer to the role of glucagon which limits them to the 5 marks”, while another “gained 6 marks because the response includes a reference to glucagon and data from the graph.” To reach the top level the report says the answer “needed to be linked to the graph with insulin and glucagon referenced.” Glucagon is the content in statement 7.14. In lessons we have students write the glucose-regulation answer twice, once without the graph and once with figures read from it, since the report shows the extra mark depended on both the Higher-only hormone and the data.

1SC0 1CH (Chemistry 1): moles, half equations and equilibrium

The 1CH report says the paper “targeted grades 4–9 with about half the marks targeting grades 4 and 5.” On the Avogadro-constant calculation in Question 5(b)ii, “Half the candidates scored at least one mark, usually for calculating the number of moles of magnesium sulfate; very few obtained the final correct answer of 1.445 × 10²³.” The report lists the steps: moles of magnesium sulfate from mass divided by relative formula mass, moles of oxygen atoms by multiplying by 4, then multiplying by the Avogadro constant, and notes that “many candidates divided a number by the Avogadro number and ended up with a negative power of 10, but didn’t think that the answer could be wrong.” We set a sense check after every standard-form answer.

On electrolysis in Question 5(c), the report says “Attempts at writing half equations were successful for the stronger candidates, but many candidates were often confused”, and “For many candidates, the use of the terms oxidation and reduction was either confused or limited to the loss or gain of oxygen.” On Question 6(b)i, “many spoilt their answer by saying that those amounts were equal”, where the report says it is the amounts that “remain constant”. On Question 6(b)iii the report says “Very few candidates mentioned that it moved to the left because there were more moles / molecules of the reactants on that side”. Half equations, redox in terms of electrons and the position of a dynamic equilibrium are the content of statements 3.27, 3.28, 3.29 and 4.17, so we drill them as separate short tasks and mark the wording against the examiners’ phrasing.

1SC0 1PH (Physics 1): momentum and Newton’s third law

The 1PH report records that on Question 5(a)i-ii, “Most candidates could select and apply the equation to calculate the momentum of the ball. There was less success in recalling the units of momentum.” The most popular route to the contact time was to use force = change in momentum / time, with one mark for selecting a suitable equation and a second for rearranging and evaluating to reach “0.0056 s”. On Question 5(a)iii the report says “more candidates could recall Newton’s third law than could explain how it applied to a foot kicking a ball.” That is the collision application in statement 2.23, so we teach students to state the law as a pair of forces acting on different objects and then name both objects in the context. The report also lists, among less successful candidates, those who “failed to set out calculations in a logical way that could be easily followed by the examiner”, and notes units including the prefixes kilo and nano caused difficulty.

1SC0 2PH, 1BH and 2CH: practical and command-word points

The 2PH report says the six-mark question, Q06(c), “tested their ability to devise a procedure for taking measurements in electrical circuits and suggest what the outcomes might be”, and advises candidates to “write down the equation they are using (if not given in the question) and show each step in their working.” The 1BH report says candidates “are still not scoring well when asked to suggest improvements to investigations”, that many answered about evolution when the question asked about extinction, and that on the three-domain question many limited their answers to “the presence or absence of a nucleus.” It also advises that “explain” means “additional scientific information is needed that is linked to the answer given”, in proportion to the marks. The 2CH report advises candidates to “Learn the differences between word, balanced and ionic equations.” For practical questions we have students plan an investigation aloud, name the variable to control and the reason, and then suggest one improvement tied to the context, since both reports ask for exactly that.

Higher-tier boundaries across three June series, double grade by double grade

Pearson publishes grade boundaries as raw marks for the overall qualification. Its document defines a boundary this way: “A grade boundary is the minimum mark at which a numbered grade (between 9 and 1) can be achieved.” It adds that “GCSE (9-1) qualifications are linear, and only the maximum mark and grade boundaries for the overall qualification are available in this document.” The Higher row is out of 360 marks (60 on each paper), and the board prints a column for every double grade, so the table below keeps every column, including the intermediate grades. The window is the three June series in our table, each a Pearson “Grade Boundaries” document with a 1SC0 Combined Science (Higher) row, and the specification’s own wording is that assessment takes place in May/June.

These readings of the table matter for planning:

• The 4-4 boundary sits at 94, 107 and 108 marks across the rows, which is 26.1%, 29.7% and 30.0% of 360. Its spread across the rows is 14 marks (108 − 94).
• The 9-9 boundary sits at 272, 284 and 282 marks, which is 75.6%, 78.9% and 78.3% of 360, a spread of 12 marks (284 − 272). The 5-5 boundary spreads by 15 marks (147 − 132).
• The 4-3 allowance starts 10, 10 and 9 marks below the 4-4 boundary across the rows (94 − 84, 107 − 97, 108 − 99).

From the 4-4 boundary to the 9-9 boundary is 178, 177 and 174 marks across the rows (272 − 94, 284 − 107, 282 − 108). Between adjacent double grades from 9-9 down to 4-4 the gap runs from 14 to 20 marks, and the step from 4-4 to 4-3 is 10, 10 and 9. Our programme uses these figures in one way. We mark every mock out of 360 and read it against the whole run of boundaries in the table, not against one series, because the 4-4 boundary alone has moved by 14 marks between series. A student who finishes a mock a few marks under 4-4 is shown where 4-3 sits, and a student aiming at the top grades is shown the mark gaps for the steps ahead. Boundaries are set after each series, and the board’s own boundaries page, linked below, is the place to check the current document.

Sources: Pearson’s Edexcel GCSE (9-1) Combined Science specification and its grade boundaries page.

Families who also need the single-subject courses can look at our Higher Edexcel GCSE Biology, Higher Edexcel GCSE Chemistry and Higher Edexcel GCSE Physics tutoring pages, which are written from the separate-science specifications and not from this one.

Higher-tier Combined Science questions