Well, an instant but not most comfortable solution is - typing on your mobile devices - because it has an on-screen keyboard to which languages can be easily added. But it's not that comfortable to type on it.
The ultimate solution would be - to install Hebrew on your PC Here is how, in the words of my student (thank you, Andre!): - In the region preferences add Hebrew to your default English setup. Now if you go into the bottom right corner of the screen (near the clock) you can switch input languages with a mouse click. And here is another tip from Andre (in his own words): "you type on the Start menu "On Screen Keyboard" and voila! a keyboard that is activated by the mouse appears and if Hebrew is selected you will write right to left and in Hebrew characters in whatever application you are in!"
However, even more comfortable would be - to type using a real keyboard. But here we have another challenge - getting used to the Hebrew keyboard layout is not an easy task either... One could use stickers, but that's not that neat and ruins the keyboard, so... the best idea from my students is - buy the cheapest USB keyboard, "ruin" it with stickers with Hebrew letters (just put white stickers and write the letters on them or write right on the keys with a correction fluid) and - hurray! - you have your Hebrew keyboard for the homeworks! Plug it in whenever you need it and hide it when you don't.