There isnt a lot of work in reception anyway
Haha, Sirzy that did make me smile 
Counting forwards and backwards to 20
Counting forwards and backwards to 20 in 2s
Counting forwards and backwards to 50 in 10s
Counting objects accurately to 10
Adding two sets of objects
Number bonds to 10
Doubling to 10
Ordering numbers to 10
Counting on from any given number, such as starting at 6
Counting back from any given number, such as 16
Saying what number is one more than any given number
Saying what number is one less than any given number
Recognising written numbers to 10
Writing numbers to 10
Learning names of regular 2D shapes
Describing properties of regular 2D shapes (number of sides, corners, etc.)
Identifying shapes in the environment
Learning all the o'clocks
Comparing lengths of household items (longer than/shorter than)
Comparing weights of household items (lighter than/heavier than)
Learning names of coins
Recognising coins and naming coins
Describing properties of coins (colour, number of sides, value)
Ordering coins
Counting pennies in 1s
Counting back with pennies in 1s
...and that's just some of the numeracy.
For literacy I would concentrate on letter formation, handwriting practice and reading, using whatever phonic teaching he is used to. If he is writing in sentences make sure he has a capital letter, finger spaces and a full stop at the end of each sentence, and that the sentence makes sense.
For topic work, look at how things move, particularly the push/pull forces. Discuss how things need a force to move. Look at seasons, names the seasons, discuss the differences between the seasons - weather, clothing, activities.
Music, PE, Art, RE and PSHE can probably wait until he is back.