Since the pool belongs to the school, you can use the word "your." We use the word "deep" to talk about the depth of something. I hope that this helps! :)
How deep is this pool?
Is the pool very deep?
Is the water going to be over my child's head?
Is this pool 2 feet or 3 feet or deeper?
My child is two feet tall, will this pool be over her head?
I am concerned about how deep the water is. Can you tell me?
Will the children be in the shallow end or the deep end?
How deep is this pool?（このプールの深さはどのくらいですか）
Is the pool very deep?（プールはすごく深いですか）
Is the water going to be over my child's head?（水は私の子どもの背よりも高くなりますか）
Is this pool 2 feet or 3 feet or deeper?（このプールの深さは2フィートですか3フィートですかそれ以上ですか）
My child is two feet tall, will this pool be over her head?（子どもの身長は2フィートなんですが、このプールはそれよりも深いですか）
I am concerned about how deep the water is. Can you tell me?（プールの深さが気になっています。教えてもらえますか）
Will the children be in the shallow end or the deep end?（子どもたちは浅い方にいますか、それとも深い方にいますか）
I would like to know the depth of the pool, please!
All pools are different sizes and taking that into consideration, the depth would be different too. Some pools are smaller in size depending on what you need it for.
What is the depth of the pool?
I would like to know the depth of the pool, please!
"depth" (deep) - how much water goes from the surface/bottom to the top
プールのサイズや深さはそれぞれ異なります。用途によって、サイズの小さなプールもあります。
What is the depth of the pool?
I would like to know the depth of the pool, please!
（プールはどのくらいの深さですか）
"depth" (deep) - how much water goes from the surface/bottom to the top
"depth" (deep) - 水深から底までの距離。
when asking the depth of a swimming pool at an establishment one can say something like "how deep is this swimming pool?" or "how many feet deep is this pool?". By using words like "deep" or "depth" you are then asking about the measurements of the pool.
スイミングプールの深さを確認するなら、次のように言えます。
"how deep is this swimming pool?"（このブールは深さはどのくらいですか）
"how many feet deep is this pool?"（このプールは深さ何フィートですか）
"deep" または "depth" を使って、プールの深さについて確認しています。
If you would like to go swimming and you would like to inquire about how far down a pool goes, you can ask about its "depth" or ask "how deep" it is.
Depth: how deep down something goes from the top to the bottom
How great: how big, how deep
"The pool is 50 meters deep."
"How deep is the pool?"
"How great is the depth of your pool?
プールに泳ぎに行くときその深さを確認したいなら、"depth" かあるいは "how deep" を使って尋ねることができます。
Depth: 底から一番上までの長さ、深さ
How great: どのくらいの大きさ、どのくらいの深さ
"The pool is 50 meters deep."（プールの深さは50メートルです）
"How deep is the pool?"（プールの深さはどのくらいですか）
"How great is the depth of your pool?（プールの深さはどのくらいですか）
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アメリカ合衆国 
南アフリカ 
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