Many back-to-school essentials are already cheaper online than they are in stores. Get a head start on shopping with the best deals from Amazon, Staples and Best Buy on everything from JanSport backpacks and graphing calculators to notebooks, pencils and more.

Original price: $110.85

More than 9,000 shoppers bought this calculator on Amazon last month. (Amazon)

Graphing calculators can be one of the biggest back-to-school expenses. Right now, Amazon has the Texas Instruments TI-84 — a model commonly required for math classes — for less than $100. If you’re looking to spend less, Staples also has the Casio FX graphing calculator, which offers many similar features and comes in pink.

Original price: $40

Save on popular JanSport backpacks in a variety of colors. (Amazon)

JanSport backpacks are a staple, but Amazon currently offers some of the best prices. Pick up a classic JanSport backpack in a variety of colors for just $36, beating in-store prices by $20. If you need extra space, Staples also has a floral JanSport laptop backpack. 

READ MORE: Buy it for life: Durable products worth every dollar (now on sale)

Original price: $129.99

Amazon has these AirPods for less than $100. (Amazon)

Save $31 on Apple’s AirPods 4 at Amazon, where they’re on sale for just $99. Staples also has the earbuds on sale, but for $117. The latest generation features improved sound quality and a more comfortable fit.

Stock up on these affordable pencils. (Amazon)

Get an 18-pack of classic yellow pencils from Amazon for just $4. If mechanical pencils are on your shopping list, Staples offers a better value with a 40-pack for only $10.

Original price: $11.49

Get these pens for more than 50% off. (Amazon)

Amazon has one of the best deals on Pilot pens, with a four-pack marked down by more than 50%. For comparison, Staples charges about $10 for a three-pack of fine-point Pilot pens, while Amazon’s four-pack costs just over $5.

Original price: $9.31

Grab a 6-pack of notebooks for just $7. (Amazon)

After comparing prices at Amazon, Staples and Best Buy, Amazon offers the best deal on this six-pack of Mead notebooks thanks to a 25% discount. The set includes six colors, making it easy to organize notebooks by class.

READ MORE: 21 small Amazon buys that make everyday tasks easier, from just $4

Original price: $89.99

Get three months worth of ink with your purchase. (Amazon)

Amazon and Best Buy are tied on price for the HP DeskJet 2955 printer at $69.99, a savings of $20. Both retailers also include three months of Instant Ink with your purchase.

Original price: $19.53

Stay organized with this three-ring binder. (Amazon)

Five Star binders cost more than $30 at Staples and Best Buy, but Amazon has them for about $20, saving you more than $14. If color isn’t a priority, the red version is an even better value at just $17.

Original price: $5.56

Amazon has 2-packs of Crayola crayons. (Amazon)

Amazon comes out ahead again with some of the best prices on Crayola supplies. A two-pack of Crayola crayons costs just $13, while a single-pack at Best Buy is priced at $31. You can also pick up a 12-count of Crayola markers for just $6.

READ MORE: Save up to 80% on summer essentials, from cooling pajamas to sandals

Owala water bottles come in dozens of fun colors, perfect for kids. (Amazon)

Amazon has kids’ Owala FreeSip water bottles for $25 in a variety of fun colors, making it an easy stop for a back-to-school essential. Choose from bright combinations like mint green and brown or orange and navy.

Original price: $9.97

A 30-count of glue sticks is less than $10. (Amazon)

No matter where you shop, it’s easy to save on Elmer’s glue sticks right now. Amazon has a 30-count pack for just over $7, while Staples offers a six-pack for $4.

READ MORE: Save 40% off or more on back-to-school essentials from HP, Anker, JanSport and more

Original price: $22.99

Best Buy has a more affordable Logitech mouse. (Amazon)

Best Buy has the best price on this Logitech wireless mouse at just $15, a 35% discount. The battery lasts up to 18 months, making it a practical pick for school or work. A similar model on Amazon costs about $30, even on sale.

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This is a No. 1 best seller on Amazon. (Amazon)

With a new Minions movie in theaters, this Simple Modern Minions backpack from Amazon is a fun back-to-school pick. It features multiple storage pockets, including a padded laptop sleeve. For a more collectible option, Kipling also offers Minions-themed backpacks, pencil cases and tablet bags.

If you’re an Amazon Prime member, you can get these items sent to your door ASAP. You can join or start a 30-day free trial to start your shopping today.