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**In depth Investigation: Greater Than or Less Than?**

Use numbers and symbols to make a number sentence correct. How many different ways can you find? Greater Than or Less Than? from nrich.maths.org.

**In depth Investigation: Guesstimate**Children work out the capacity of their classroom in litres.

**In depth Investigation: Percentage Puzzles**Children work systematically to find equivalent percentages of different amounts.

**In-depth Investigation**Use Day 1’s Group Activity as this unit’s investigation.

**In-depth Investigation: A4 Fraction Addition and/or A4 Fraction Subtraction**Explore calculating with fractions using A4 paper to model wholes and related parts. A4 Fraction Addition and/or A4 Fraction Subtraction from nrich.maths.org.

**In-depth Investigation: Fraction Fireworks**

Children find the answers to a sequence of fraction multiplications and look for patterns in the answers.