### Ratio and Egg Sandwiches

You will need:• 1 hard boiled egg per child

• 1 large jar of mayonnaise for the whole class

• 2 slices of bread per child (buy slices that are as close to a square as possible)

• small bowl, teaspoon, dinner-knife and fork for each group.

• a teaspoon for each child for tasting.

Children work in small groups of 3s or 4s

**Task 1: Find the best ratio of egg to mayonnaise**

1 egg is mashed with a fork and 1 level teaspoon (tsp) of mayonaise is added at a time until the group decides on the best flavour.

Record results as 1 egg : __ tsp mayonnaise

The group repeats this ratio for the remaining eggs. ___eggs : ___ tsp mayonnaise

**Task 2: Find the best ratio of egg to slices of bread**

Ask the group to make one set of sandwiches with a ratio of 2 : 1 slices of bread to eggs.

Slice the round into quarters.

What other ratio of slices of bread to eggs does the group want to try?

Slice a round into quarters, but make the 4 parts look different to the first sandwich.

**Teaching notes:**

Eggs and mayonnaise can be kept out of a fridge for up to 2 hours. Do not eat if out of a fridge for a longer period.

Each child has a teaspoon for tasting the egg and mayonnaise mix. Use the handle to take a small amount and wash it up between each tasting session.

Butter or margarine is not necessary.

### Cafe calculations

Using your ratios calculate the amount of ingredients needed for each of these.

• If a box of 6 eggs is used to make sandwiches, how many teaspoons of mayonnaise will be needed? How many slices of bread will be needed?

• How many eggs will be needed to make sandwiches using a loaf of bread with 24 slices? how many teaspoons of mayonnaise will be needed?

• 16 children at a party will each have 3 small quarter sandwiches each. How many slices of bread and eggs will be needed?

## **Easter Maths Activities**

**Repeated Patterns on Painted Eggs**

Use repeating colours and shapes.

What patterns can you make with

2 colours? 3 colours? Dots and lines?

**Easter Egg Tangrams**

How many differnt shapes can you make?

How many birds can you make?

Can you put the egg together again?

**Easter Egg Rolling**

Opportunities for measuring length

and collecting and sorting data.