Jessica Alba claims she doesn't understand her daughter's homework.

The 34-year-old actress and entrepreneur, who has Honor, six, and Haven, three, with husband Cash Warren, admits she often struggles to help their eldest child with maths.

She said: ''Honor is reading chapter books and doing math - but it's so different from when I learned math. It's all about grouping numbers. I look at it and I'm like, 'Is that algebra? In the first grade?' But I like that they're using new methods. I don't really understand it. So it's challenging.''

Jessica thinks her youngest daughter, who just started learning how to write, is also very smart.

She told Us Weekly magazine: ''Haven is getting her letters down and counting.''

The Honest Company founder recently celebrated her birthday, but isn't upset about getting older.

She explained: ''I was much more fussy and nit-picky about imperfections before I had kids. Now it's like, hey, just own it.''

The 'Sin City' star previously admitted she ''can't imagine'' having more children in the future.

Asked if she wants to try to have a little boy, she said: ''I'm just happy to have healthy babies and - not right now - I'm busy. I'm really busy! I love kids and I love babies, but right now, I can't imagine. It just started to get easy.''